class_docstr: A structured environment which returns random actions
docstr: :return The action id (sub_step_index, not used)
docstr_tok: [":","return","The","action","id","(","sub_step_index",",","not","used",")"]
code: def actor_id(self) -> ActorID:
      """
      :return The action id (sub_step_index, not used)
      """
      return ActorID(step_key=self._sub_step_index, agent_id=0)
  
imports: from typing import Any, Dict, Union, Tuple, Callable, Optional
  import gym
  import numpy
  from maze.core.env.maze_env import MazeEnv
  from maze.core.env.structured_env import StructuredEnv, StepKeyType, ActorID
  from maze.core.env.structured_env_spaces_mixin import StructuredEnvSpacesMixin
  from maze.core.wrappers.wrapper import Wrapper
label_desc: Use image node_id 5 for calling the DummyStructuredEnvironment obj's underlying member method code with example usage: obj.actor_id() and returns: ActorID